/Engine/Source/Runtime/Engine/Classes/Engine/Texture.h
Access the given texture mip in the form of a read onlyFSharedBuffer. This method does not make a copy of the mip but instead returns a view. The returned buffer will keep a ref count on the original full mip chain allocation, so will remain valid even after theFMipDataobject has been destroyed.
FSharedBuffer GetMipData &40; int32 BlockIndex, int32 LayerIndex, int32 MipIndex &41; const